<template>
  <div class="login_container">
    <div class="login_box">

      <!-- 头像区域 -->
      <div class="avatar_box">
        <img src="../assets/logo.png" />
      </div>

      <!-- 登录表单区域 -->
      <el-form label-width="0px" class="login_form" :model="loginForm" :rules="rules" ref="formRef">
        <!-- 用户名 -->
        <el-form-item prop="username">
          <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
        </el-form-item>
        <!-- 密码 -->
        <el-form-item prop="password">
          <el-input show-password prefix-icon="iconfont icon-3702mima" v-model="loginForm.password"></el-input>
        </el-form-item>
        <!-- 按钮 -->
        <el-form-item class="btns">
          <el-button type="primary" @click="login">登录</el-button>
          <el-button type="info" @click="resetForm">重置</el-button>
        </el-form-item>
      </el-form>

    </div>
  </div>
</template>

<script>
export default {
  name: "Login",
  data() {
    return {
      // 登陆表单
      loginForm:{
        username: "admin",
        password: "123456"
      },
      //验证规则
      rules:{
        username:[
          { required: true, message: '请输入用户名', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' }
        ]
      }
    }
  },
  methods:{
    //重置表单
    resetForm(){
      this.$refs.formRef.resetFields();
    },
    //登录
    async login(){
      //表单预验证
      this.$refs.formRef.validate(isValid=>{
        if(!isValid) return false;
      });

      //发起登录请求
      const {data: res} = await this.$http.post('login',this.loginForm);
      //登陆失败
      if(res.meta.status !== 200) return this.$message.error("登录失败");
      //登录成功
      this.$message.success("登录成功");
      // 1.将登录成功之后的token保存到客户端的sessionStorage中
      sessionStorage.setItem('token', res.data.token);
      //2.跳转到/home组件
      this.$router.push('/home');
    }
  }
};
</script>

<style lang="less" scoped>
.login_container {
  height: 100%;
  background-color: #2b4b6b;
}

.login_box {
  width: 450px;
  height: 300px;
  background-color: #fff;
  border-radius: 3px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);

  .avatar_box {
    height: 130px;
    width: 130px;
    border: 1px solid #eee;
    border-radius: 50%;
    padding: 10px;
    box-shadow: 0 0 10px #ddd;
    position: absolute;
    left: 50%;
    transform: translate(-50%, -50%);
    background-color: #fff;
    img {
      width: 100%;
      height: 100%;
      border-radius: 50%;
      background-color: #eee;
    }
  }

  .btns{
    display: flex;
    justify-content: flex-end;
  }

  .login_form{
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
  }
}
</style>